What are the Best writing ways for creating the Test cases to these scenarios? - For Regression and daily testing - For Documented Test Cases

What I can understand from your question is that , you are trying to ask what is the best approach to write Regression and daily testing scenarios . 

For regression, the best approach is to take the critical scenarios and also the areas which are prone to bug

For daily testing: BRS , SRS , positive and negative scenarios should be taken into consideration

Thanks & Regards

There are parameters which we need to follow before tests are :

(1) why we need to test?

(2) What is the significance of testing.

(3) How can we make better the product.

First pick critical/business functionality test cases from functional test cases and create a new regression test and execute it daily when new build is given to your end.